Revenue (Schedule of Uncollectible Amounts And Change in Expected Allowance for Credit Losses for Trade Accounts Receivable and Unbilled Receivables) (Details) - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Revenue From Contract With Customer [Abstract]
Balance, beginning		$ 3,922	$ 3,664
Changes in estimates		344	(218)
Write-offs		(83)	(18)
Other	[1]	20	(119)
Balance, ending		$ 4,203	$ 3,309

[1] Includes effects of foreign exchange rate changes during the period.